Fig. 4. Morphology, pore structure and filtration efficiency of PP/MgSt melt blown nonwovens. SEM images of PP melt blown containing MgSt particle concentrations of (a) 0, (b) 0.1, (c) 0.3, (d) 0.5, (e) 0.7 and (f) 1 wt%. (g) Average diameter, (h) average pore size and porosity, (i) filtration performance of the uncharged samples.
